If each edge of a cube is doubled
how many times will its volume increase?

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Solution

The correct option is C 7
Volume of cube (V) = $l^{2}$
When edge of cube is doubled, then
Volume of the cube $(V^{'}) = (2 l)^{3} = 8 l^{3}$
$V^{'} = 8 \times V$

Hence volume will increase 8 times

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